• Acer Nitro 5 AN515-55-76A5 brak obrazu

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#1 Acer Nitro 5 AN515-55-76A5 brak obrazu


by Kita18 14 October 2024, 09:08
Witam . Próbuję naprawić Nitro 5 . Niestety cały czas nie podaje obrazu
bios zrobiony ale dalej to samo . Wszystkie napięcia są poza napięciem na
PLG1 (zasilanie karty graficznej procesora ) Co można jeszcze sprawdzić ?
Płyta to FH51M LA-J871P
Dość niska oporność na fazach Procesora 1,5 Ohm

Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by Google Adsense [BOT] 14 October 2024, 09:08

#2 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by matic 18 October 2024, 13:41
Hello!

Measure the power consumption (in mA) of the board, when the machine is turned on with and without RAM memory connected (without the main battery).

#3 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by Kita18 22 October 2024, 12:31
Witaj. Sprawdziłem i pobór z RAM jak i bez jest taki sam . Pobór delikatnie pływa . 1,0900-1,2000 Amper

#4 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by matic 4 November 2024, 11:37
Measure the voltages to ground on listed points, when the machine is turned on with the RAM connected:
- On pin 1 of resistor RH46.
- On pins 1, 3, 4, 6 of transistor QH7.
- On pin 20 of chip PUM1.
- On pins 13, 21, 32, 74, 115 of KBC chip.

#5 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by Kita18 24 November 2024, 09:04
Rh46
pin 1 - 118mV
Pum1
Pin20-0.618 v
Qh7
Pin1 - 3.3v
Pin3- 3.3v
Pin4- 3.3v
Pin6- 3.3 v
Kbc
Pin13-3.3v
Pin21-1.05v
Pin32-3.3v
Pin74-3.3v
Pin 115-3.3 v

#6 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by matic 3 December 2024, 12:31
- Measure the resistance to ground on pin 1 of resistor RH46.
- Measure the voltage to ground on pin 2 of resistor RH46.
- Check the resistor RH46 (470Ω).

#7 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by Kita18 3 December 2024, 16:10
Pin 1 resistance 0,640 KΩ
Pin 2 voltage -1,213 v
Resistor - 0,52 KΩ

I replaced the resistor with 470 ohms.
Nothing has changed

#8 Re: Acer Nitro 5 AN515-55-76A5 brak obrazu


by matic 9 December 2024, 08:37
Measure the voltage to ground on pin 1 of resistor RH46 with the RAM memory connected and disconnected from the board.

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